242559817 has 4 divisors (see below), whose sum is σ = 253105920. Its totient is φ = 232013716.

The previous prime is 242559761. The next prime is 242559869. The reversal of 242559817 is 718955242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 718955242 = 2 ⋅359477621.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242559817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242559887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5273017 + ... + 5273062.

It is an arithmetic number, because the mean of its divisors is an integer number (63276480).

Almost surely, 2^242559817 is an apocalyptic number.

It is an amenable number.

242559817 is a deficient number, since it is larger than the sum of its proper divisors (10546103).

242559817 is a wasteful number, since it uses less digits than its factorization.

242559817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10546102.

The product of its digits is 201600, while the sum is 43.

The square root of 242559817 is about 15574.3319920952. The cubic root of 242559817 is about 623.6481218290.

The spelling of 242559817 in words is "two hundred forty-two million, five hundred fifty-nine thousand, eight hundred seventeen".